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MIPS: Transparent Huge Pages support

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Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Ralf Baechle
2012-10-18 13:54:15 +02:00
parent f65aad4177
commit 970d032fec
8 changed files with 243 additions and 6 deletions
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11
arch/mips/include/asm/pgtable-bits.h
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@@ -137,8 +137,17 @@
#define _PAGE_HUGE ({BUG(); 1; }) /* Dummy value */
#endif
#ifdef CONFIG_MIPS_HUGE_TLB_SUPPORT
/* huge tlb page */
#define _PAGE_SPLITTING_SHIFT (_PAGE_HUGE_SHIFT + 1)
#define _PAGE_SPLITTING (1 << _PAGE_SPLITTING_SHIFT)
#else
#define _PAGE_SPLITTING_SHIFT (_PAGE_HUGE_SHIFT)
#define _PAGE_SPLITTING ({BUG(); 1; }) /* Dummy value */
#endif
/* Page cannot be executed */
#define _PAGE_NO_EXEC_SHIFT (cpu_has_rixi ? _PAGE_HUGE_SHIFT + 1 : _PAGE_HUGE_SHIFT)
#define _PAGE_NO_EXEC_SHIFT (cpu_has_rixi ? _PAGE_SPLITTING_SHIFT + 1 : _PAGE_SPLITTING_SHIFT)
#define _PAGE_NO_EXEC ({BUG_ON(!cpu_has_rixi); 1 << _PAGE_NO_EXEC_SHIFT; })
/* Page cannot be read */